2026 Leaf Metal Baseball Sean Gamble Pre Production Proof 1/1

Rare 2026 Leaf Metal Baseball pre-production proof card featuring Sean Gamble. This is a one-of-one (1/1) item from the production process, making it an exceptional find for serious collectors. Pre-production proofs offer a unique glimpse into card manufacturing and are highly sought after for their scarcity and historical significance. Perfect for the dedicated baseball card enthusiast or Gamble fan looking to own a truly unique piece.